<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    * {
      margin: 0;
      padding: 0;
    }
    .box {
      width: 1225px;
      height: 616px;
      background-color: powderblue;
      margin: 0 auto;
    }
    .leftBox {
      float: left;
      width: 225px;
      height: 616px;
      background-color: purple;
    }
    .rightBox {
      float: left;
      width: 1000px;
      height: 616px;
    }
    .rightBox li{
      float: left;
      background-color: pink;
      width: 235px;
      height: 300px;
      margin-left: 15px;
      list-style: none;
    }
    .rightBox .buttom {
      margin-top: 15px;
    }
  </style>
</head>
<body>
  <div class="box">
    <div class="leftBox">左青龙</div>
    <div class="rightBox">
      <ul>
        <li>1</li>
        <li>2</li>
        <li>3</li>
        <li>4</li>
        <li class="buttom">5</li>
        <li class="buttom">6</li>
        <li class="buttom">7</li>
        <li class="buttom">8</li>
      </ul>
    </div>
  </div>
</body>
</html>